chore(deps): update dependency @maplibre/maplibre-gl-style-spec to v26.4.2

[renovate]

This PR contains the following updates:

Package	Change	Age	Confidence
@maplibre/maplibre-gl-style-spec (source)	26.2.1 → 26.4.2

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Release Notes

maplibre/maplibre-style-spec (@​maplibre/maplibre-gl-style-spec)

v26.4.2

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✨ Features and improvements

• Allow negative fill-extrusion-base and fill-extrusion-height values, extruding below ground level (e.g. underground floors) (#​1794) (by @​clement-igonet)
• Add SDK support tracking for SDF fill pattern colorization (#​1854) (by @​deniial00)

🐞 Bug fixes

• Validate -transition properties on sky the same way light already does, so sky-color-transition and similar keys no longer report as unknown properties (#​1867) (by @​Yasser-Ameur)

v26.4.1

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✨ Features and improvements

• Publish the ESM build (dist/index.mjs, referenced by package.json#module) as one module per source file instead of a single bundle, so that bundlers which eliminate dead code at module granularity can drop unused parts of the package (#​1829) (by @​ahocevar)

🐞 Bug fixes

• Fix validation and typescript types for font-faces (#​1840) (by @​HarelM)

v26.4.0

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✨ Features and improvements

• Enable data-driven icon-rotation-alignment (#​1836) (by @​Turbo87)
• Make url optional for image sources. An image source can now be defined with only type and coordinates; it renders nothing until an image is set at runtime (#​1817)

🐞 Bug fixes

• Fix missing setFontFaces operation when style changes (#​1837) (by @​HarelM)

v26.3.0

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✨ Features and improvements

• Add semiliteral operator for expressions inside arrays and objects (#​951) (by @​sargunv)
• Add symbol-height-offset and symbol-height-anchor properties to symbol layers to allow icons and text to be elevated above the ground (#​1508) (by @​HatulaPro)

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